Ordered Mesoporous Metal Carbides with Enhanced Anisole Hydrodeoxygenation Selectivity

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• 作者：Qi Lu ; Cha-Jung Chen ; Wesley Luc ; Jingguang G. Chen ; Aditya Bhan ; Feng Jiao
• 刊名：ACS Catalysis
• 出版年：2016
• 出版时间：June 3, 2016
• 年：2016
• 卷：6
• 期：6
• 页码：3506-3514
• 全文大小：505K
• 年卷期：0
• ISSN：2155-5435

文摘

Mesoporous metal carbides are of particular interest as catalysts for a variety of reactions because of their high surface areas, porous networks, nanosized walls, and unique electronic structures. Here, two ordered mesoporous metal carbides, Mo₂C and W₂C, were synthesized using a nanocasting approach coupled with a simultaneous decomposition/carburization process under a continuous methane flow. The as-synthesized mesoporous Mo₂C and W₂C have three dimensionally ordered porous structures, large surface areas (70–90 m² g^–1), and crystalline walls. In vapor-phase anisole hydrodeoxygenation (HDO) reactions, they exhibited turnover frequencies of approximately 9 and 2 × 10^–4 mol mol_CO^–1 s^–1, respectively, at relatively low reaction temperatures (423–443 K) and ambient hydrogen pressures. Notably, the ordered mesoporous W₂C catalyst showed a greater than 96% benzene selectivity in anisole HDO, the highest benzene selectivity reported to date.